Abstract
AbstractHighly ordered LiMnPO4 (LMP) and LiMnPO4/C (LMP/C) were successfully synthesized with a facile hydrothermal process via cholesteryl caprylate (C35H60O2) liquid crystal‐assisted routine. The structures and morphologies were characterized through X‐ray diffraction, X‐ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. The electrochemical performances of LiMnPO4 and LiMnPO4/C were investigated by cyclic voltammetry, charge‐discharge and alternating current (AC) impedance test. As‐prepared orthorhombic LiMnPO4 presents a large number of (020) planes and minimizes the paths for Li diffusion. The ordered LiMnPO4/C possess the higher rate and cycling performances with a specific discharge capacity of 156 mA h g−1 at 0.1C, and the remained capacity of 145 mA h g−1 after 100 cycles. These excellent results show that cholesteryl caprylate liquid crystal plays a crucial role in forming the structure with more active (020) planes for efficient Li+ extraction and insertion.
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